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Trek -18C/0F Down Sleeping Bag
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Trek -18C/0F Down Sleeping Bag + Sea To Summit

Trek -18C/0F Down Sleeping Bag

Natural down sleeping bag - Trek -18C/0F Down - Sea to Summit - 2026

£293.90
-25%
£391.90
VAT and custom duties included
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Trek -18C/0F Down Sleeping Bag
£293.90
-25%
£391.90
VAT and custom duties included
return 60 days to change your mind
Get £5.88 off your next order.
Description

The sleeping Trek -18C/0F Down bag from Sea to Summit is an ideal sleeping bag for your globetrotting adventures during very cold nights.

With a fill power of 650+ and duck down construction with treatment Ultra Dry Down, this bag provides warmth and comfort and ensures good water resistance and moisture resistance. Its recycled polyester shell provides excellent durability, so that it Trek can accompany you on a multitude of adventures and in low temperatures.

Its semi-rectangular hybrid shape is both spacious and comfortable. The zip closing system FreeFlow allows for effective temperature regulation and provides greater functionality for enhanced freedom of movement. The main zip provides an opening along the entire length and has a zip guard and two sliders. The secondary zip has a half-length length, and for even greater comfort and functionality, there is also a zip at the feet with two sliders.

The Trek -18C/0F Down is therefore the perfect companion for the globetrotter that you are. It will provide you with comfort, warmth, space and practicality.

Trek -18C/0F Down Sleeping Bag
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Technical details
Comfort temperature
-11
Sleeping bag shape
Mummy
Insulation type
Down
Use - sleeping bag
Trekking
Overview
Brand
Sea To SummitSea To Summit-logo
Warranty
2
Year
2026
Season
Spring
Gender
Unisex
Product details
Weight (g)
1895
Shoulders (cm)
84
Feet (cm)
65
Length (cm)
198
Compressed volume
26
Technical details
Composition
Duvet RDS 650+
Zip side
Droit Gauche
Seasons
4
Combinable
No
Performance
Extreme temperature
-39
Comfort temperature limit
-18
Use type
14605 14613
Filling
Down
Other features

- Semi-rectangular hybrid shape with Hood
- Spacious and comfortable design
- 2 Closing systems
- Full-length main zip with zip guard and 2 sliders
- Half-length secondary fastening with zip guard and 2 sliders
- Zip at the foot level with 2 sliders
- RDS-certified Ultra Dry Down down
- PFC-free product

Composition :
- Filling : Goose down with 650 CUIN treatment
- Outer material and filling: Recycled polyester



Taille Regular Wide
Dimensions (cm) 185 x 158 198 x 168
Volume compressé (L) 14.2 15.9
Poids (g) 1895 2098
Poids du garnissage (g) 1000 1163





Responsible Down Standard (RDS) 100% of the down used in our sleeping bags and duvets is independently certified according to the RDS standard (Responsible Down Standard). The RDS certifies animal welfare requirements and traceability from source to final product. Purchasing RDS-certified products demonstrates demand for better animal welfare practices in the down and feather supply chain. Sea to Summit is RDS certified.
650+ loft Ultra-Dry Down It is the third most voluminous down used in sleeping bags and duvets Sea to Summit. 650+ Fill Power indicates that one ounce (30g) of down will re-expand to over 650 cubic inches after compression. A higher fill power means that less down is used to achieve the same temperature, which is important for high-performance sleeping bags. The loft and the quality/composition of the down are independently tested by the International Down and Feather Laboratory (IDFL) - a copy of the certification is provided with each sleeping bag Sea to Summit. The down comes from a responsible source, is RDS certified and is treated with our PFC-free Ultra-Dry Down™ treatment.
Free Flow Zip Our triple zip Free Flow allows your sleeping bag to retain maximum warmth and efficiency when needed, as well as multiple ventilation options when it is not. The (half) zip on the right side of the bag (left side on women's bags) provides freedom of movement for both arms, extra ventilation and allows you to fold the top third of the bag into a (mini) duvet when the mercury rises higher than expected.

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